This is a porting of "typescript-string-operations" (https://github.com/sevensc/typescript-string-operations) adapted to work correctly with angular 4 and above

jQuery required. Unit tested (work in progress).

USAGE:

String.Empty

var id = String.Empty;

String.IsNullOrWhiteSpace():

var id = image.GetId();
if(String.IsNullOrWhiteSpace(id))
	return image;

String.Format():

var id = image.GetId()
String.Format("image_{0}.jpg", id)
output: "image_2db5da20-1c5d-4f1a-8fd4-b41e34c8c5b5.jpg";

Specifier available!

var value = String.Format("{0:L}", "APPLE"); //output "apple"

value = String.Format("{0:U}", "apple"); // output "APPLE"

value = String.Format("{0:d}", "2017-01-23 00:00"); //output "23.01.2017"


value = String.Format("{0:s}", "21.03.2017 22:15:01") //output "2017-03-21T22:15:01"

value = String.Format("{0:n}", 1000000);
//output "1.000.000"

Specifier	Result
L	LowerCase
U	UpperCase
d	ShortDatePattern
s	SortableDateTimePattern
n	Thousand seperator

String.Join():

var value = String.Join("; ", "Apple", "Banana");
//output: "Apple; Banana";

OR

var array = ['Apple', 'Banana']
var value = String.Join("; ", array);
//output: "Apple; Banana";

Methods

Method	Type	Description	Parameter
Empty	Property	simply returns "".
IsNullOrWhiteSpace	Method	returns true value if given parameter is either null, empty or undefined.	format, args
Format	Method	Converts the value of objects to strings based on the formats specified and inserts them into another string.	format, args
Join	Method	Combines arguments delimited by given seperator.	delimiter,args
Join	Method	Combines arguments delimited by given seperator from array.	delimiter,array

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